I am planning to run lines back to the cockpit by using a mast plate with turning blocks under the bottom of the mast. By having the vertical force on the lines pushing on the mast rather than pulling on the cabin top, it reduces stress on the cabin top. I did this on my previous boat with success. However, 5 hours before signing the papers, I broke my foot and was unable to see the configuration of the mast and the deck (the mast is unavailable until later in March). I have been unable to find the bottom of the mast cross section dimensions in order to buy the correct plate plate If anyone has this information or knows where I can find detailed plans, I would appreciate it. I also need to know if there is enough space between the key and the edge of the mast to make this work.